Lichens : Arthoniales : LecanographaceaeLichens

Lecanographa amylacea (Ehrh. ex Pers.) Egea & Torrente

Description: This small crustose lichen of ancient dry-barked trees having a chalky white thallus scattered with tiny brown flecks, occurs low down on old tree boles, usually between root plate and waist height. It is a species of oak especially in ancient woodland or in former wood-pasture sites. In Ireland the species has been recorded in Fermanagh and Londonderry.

Key Identification Features:

  • Thallus chalky — about 1cm across — with numerous small pale brown flecks (easily missed) UV+ lime-green/blue-green; discs rare
  • On old, dry oak bark in former parkland or ancient woodland sites.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Lecanographa amylacea at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Lecanographa amylacea at iNaturalist World Species Observations database.

 Giavarini, Vince J., Simms, Michael J., & Davey, Simon, 2026. Lecanographa amylacea. (Ehrh. ex Pers.) Egea & Torrente. [In] Lichen Ireland.
https://www.habitas.org.uk/lichenireland/species.php?item=19184. Accessed on 2026-11-12.